Car-truck construction



s. P. BUSH CAR TRUCK CONSTRUCTION Filed Jan. 4, 1927 2 Sheets-Sheet 1 Aug; 7, 1928., 1,679,811

' s. P. BUSH CAR TRUCK CONSTRUCTION Filed Jan. 4, 192'?" 2 Sheets-Sheet 2 i I -;T 1 -20 W- Patented Aug. 7, 1928.

UNITED STATES PATENT OFFICE.

$AMUEL P. BUSH, OIE COLUMBUS, OHIO, ASSIGNOR TO THE BUCKEYE STEELOASTINGS COMPANY, OF COLUMBUS, OHIO.

CAR-TRUCK CONSTRUCTION.

Application filed January 4, 1927. Serial No. 158,951.

This invention relates to improvements in car truck construction, an object of the invention being to provide a construction in which equalization of the load on the springs shall be insured; in which adequate spring capacity shall be had without widening the bolster or the bolster opening in the side frames, and in which disassembling of the truck to effect wheel changes or for other purposes, shall be facilitated.

A further object is to provide a structure having the characteristics above mentioned and which shall also make provision to accommodate the rocking movements of the bolster.

With these and other objects in View, the invention consists in certain novel features of construction and combinations of parts ashereinafter set forth and pointed out in the claims.

' Tn the accompanying drawings;

Figure 1 is a view in side elevation showing a truck side frame and embodying my improvements;

Figure 2 is a plan view showing the spring cap or yoke 3 Figure 3 1S aview in section taken transversely of the side frame showing the cap or yoke applied;

T igur'e 4 is a sectional view on the line 4l4 of Figure 3.

The side .frame of the car truck comprises an upper compression member 1, a lower tension member 2, and columns 3 integrally connecting the compression and tension members and defining abolster-receiving opening. The lower portions of the columns are nearer together than their upper portions, as shown in Fig. 1, and spring seats 4 are formed near the bases of the columns over the lower tension member of the side frame, the end of the spring plank 5 being received between the lower portions of the columns adjacent the spring seats 4 and resting upon the tension member and interlocked therewith as indicated at 5*, said spring plank filling the space between the seats. 1

Each column 3 comprises spaced members 3 throughout a portion of its height and partially house springs 9, the lower ends of which rest partially upon the seats 4. and

partially upon the spring plank 5, and other springs 9 rest at their lower ends upon the spring plank.

The bolster end enters the upper portion of the bolster opening in the side frame, the construction being such that a space 8 will be left between the bolster 24 and the intermediate portion of the compression member 1, so that the bolster may be raised to facilitate assembling and disassembling opera,- tions.

Between the bolster and the springs, a cap or yoke 19 is located. The cap or yoke 19 is of cruciform outline, one lobe or arm '20 being disposed over each spring. Two

diametrically opposite lobes or arms engage within the columns of the side frame and the other diametrically opposite arms or lobes project through and outwardly beyond the bolster opening. On the upper side of the cap is a central rib 21 extending longitudinally of the side frame and a central rib 22 at right angles to the rib 21 and crossing the. same. The rib 22 which is pri marily a reenforcing rib is of arcuate form so that it projects at its center appreciably above the rib 21 and it is received within a concave groove 23 formed in the underside of the bolster 24 at the end thereof, while the rib 21 is received in a groove or seat 25 formed transversely in the bottom of the bolster. Upon reference to Fig. 3, more particularly it will be noted that the rib 21 fits loosely 1n the groove 25v so that it will accommodate the relative rocking movement of the bolster which is facilitated by the clearance left between the bolster at 23 and the reenforcing rib 22. VVhile I have shown the reenforcing rib 22 of arcuate form it is obvious that any other suitable form of rib may be used. It will be noted that the cap is interlockedwith the bolster at the bottom only but it accommodates the normal relative play or movement of the bolster and insures efficient distribution and equalization of the stresses on the springs. With my improvements, when whee changes are necessary or, for any other reason, it is desired to disassemble the truck, the bolster is jacked up so that the spring outside the longitudinal center line of the frame may be removed, and in order to apply suitable blocks between the bolster and the spring plank to hold the bolster above the interlocking relation to the cap.

Then, if the spring plank, together with remaining springsfca and bolster, superposed on the spring p ank be jacked up so as to be freed from the side frame, the interengaging elements at the journal boxes having been released, the side frame, cap or yoke, and the springs within the columns, may be withdrawn laterally, as one unit leaving the spring plank, inside bolster springs and bolster in their proper relation and not materially disturbed. A reverse procedure will, of course, quickly and easily reassemble the truck.

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. In a car truck, the combination of a side frame having columns defining a bolster opening, a bolster entering said openp ing and having a longitudinal 'arcuate groove in its bottom, springs below the bolster, and a cap mounted on said springs and having an upwardly projecting arcuate rib entering the arcuate groove in the bottom of the bolster.

2. In a car truck, the combination of a side frame having columns defining a bolster opening, a bolster entering said opening and having a longitudinal groove in its bottom, springs below the bolster, and a cap mounted on said springs and having an upwardly projecting rib entering the groove in the bottom of the bolster.

3. In a car truck, the combination of a side frame having columns defining a bolster opening, a bolster entering said opening and having a longitudinal arcuate groove and a transverse groove in its bottom, a spring plank, springs below the bolster, and a cap mounted on said springs, said cap having an arcuate rib projecting upwardly and freely entering the arcuate groove in the bottom of the bolster and said cap also having a transverse rib entering the transverse groove in the bottom of the bolster, and forming a support for the bolster.

In testimony whereof, I have signed this specification.

SAMUEL P. BUSH. 

